I have taken the 4.0 firmware downloaded from Apple and extracted it into a folder on my desktop. I downloaded vfdecrypt and ran this in command prompt: Code: cd (path) vfdecrypt.exe -i 018-5533-585.dmg -o decrypted.dmg -k d88fa434f6a8c50fd49cd0923879da5c3079c59c0e534cff521a9cecbcad48d84b4daef0 Apparently it isn't working, because when I try to open it, TransMac told me: "No Mac HFS volumes found." I got similar results from HFSExplorer and PowerISO. Apparently it isn't in HFS format, and Windows tells me it's a Mac Disk Image File (dmg). What do?